I've come to the conclusion that keeping a spray gun clean is imperative in order to keep it spraying properly. In spite of quickly cleaning after each use I find that the air cap and various other small parts of my HVLP gun tend to accumulate bits of finish. I'm considering buying an inexpensive ultrasonic cleaner to keep the above mentioned parts clean but wonder if anyone else has done the same thing and has it worked out well. Thanks for your input.